Men regard it as their right to return evil for evil, and if they cannot feel they have lost their liberty.
Aristotle (384–322 BC) was an ancient Greek philosopher and scientist. His writings cover many subjects – including physics, biology, zoology, metaphysics, logic, ethics, aesthetics, poetry, theater, music, rhetoric, linguistics, politics and government – and constitute the first comprehensive system of Western philosophy. He was Plato's student and Alexander the Great's tutor.
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